102120022211221 has 12 divisors (see below), whose sum is σ = 120871804791712. Its totient is φ = 84513121825104.

The previous prime is 102120022211203. The next prime is 102120022211243. The reversal of 102120022211221 is 122112220021201.

It is not a de Polignac number, because 102120022211221 - 2¹¹ = 102120022209173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120022211201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8673344055 + ... + 8673355828.

Almost surely, 2^{102120022211221} is an apocalyptic number.

It is an amenable number.

102120022211221 is a deficient number, since it is larger than the sum of its proper divisors (18751782580491).

102120022211221 is an equidigital number, since it uses as much as digits as its factorization.

102120022211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346699948 (or 17346699919 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102120022211221 its reverse (122112220021201), we get a palindrome (224232242232422).

The spelling of 102120022211221 in words is "one hundred two trillion, one hundred twenty billion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".